Delicatophycus liuweii Liu & Li & Wu & Kociolek 2021
- 1. School of Environmental Science and Engineering, Guangzhou University, Guangzhou, Guangdong 510006, China. & 570123562 @ qq. com; https: // orcid. org / 0000 - 0002 - 1380 - 4134
- 2. Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, P. R. China. & yanlingli @ ynu. edu. cn; https: // orcid. org / 0000 - 0002 - 3540 - 8706
- 3. Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, P. R. China. & wuhan @ ynu. edu. cn; https: // orcid. org / 0000 - 0002 - 6190 - 7939
- 4. Museum of Natural History and Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado- 80309, USA. & patrick. kociolek @ Colorado. EDU; https: // orcid. org / 0000 - 0001 - 9824 - 7164
Description
Delicatophycus liuweii Y.- L. Li sp. nov. Figs 1–25
Description:— LM: Valves strongly asymmetrical to the apical axis, lanceolate, dorsal margin strongly arched, ventral margin nearly straight to slightly concave, except at mid-valve, where it is slightly tumid (Figs 1–7). Ends obtusely rounded. Length 32–56 μm, breadth 8.0–9.5 μm. Maximum length/width ratio 6.0 (n=60). The axial area is moderately wide, linear-lanceolate in shape. Central area absent. Raphe strongly lateral, becoming filiform near the distal ends and slightly reverse-lateral near the proximal ends. Proximal raphe ends distinct, ventrally bent, external distal raphe ends dorsally deflected. Striae radiate. Stigmata 3–6 positioned on the ventral side of the central nodule and adjacent to the middle ventral stria. Striae in the middle 11–12 in 10 μm, becoming up to 20–21 in 10 um towards the ends, areolae 25–27 in 10 μm.
SEM: Externally, axial area moderately wide, curved, ventrally displaced near the central area (Figs 14–19). Proximal raphe branches ventrally deflected (Figs 18–19), distal raphe fissures strongly curved towards the dorsal side (Figs 16–17). Striae radiate throughout (Figs 14–15) and extending onto the mantle without interruption (Fig. 18). Valve face areolae 25–27 in 10 μm. Stigmata 3–6, present on the ventral side near the central nodule (Figs 18–19). Apical pore fields absent (Figs 14–17).
Internally, the axial area is linear-lanceolate (Figs 20–21). Distal raphe endings terminate as helictoglossae, deflected slightly off the main raphe axis (Figs 22–23). The central nodule is indistinct. Raphe continuous, lacking an intermissio in the center (Figs 20–21, 24–25). Stigmata 3–6, present on the ventral side near the central nodule (Figs 24, 25). Each stigma is surrounded by siliceous protuberances (Figs 24–25). Each stria is positioned within an alveolus internally (Figs 20–21).
Type: — CHINA. Guangxi Province, Hechi City, Liujiang River, upper tributary of unknown name, 24° 44.56′ N, 107° 55.02′ E. 675 m asl, W.Liu on 8th July 2018. (holotype: Herbarium of Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences! Slide # GXLJ01 = Fig. 1).
Etymology: —The specific epithet ‘ liuweii ’ refers to the name of the sample collector.
Ecology: — Delicatophycus liuweii has so far only been found in the Liujiang River, in a littoral habitat with low CODMn (0.9 mg ·L- 1), BOD5 (4.05 mg ·L- 1) and NH 4 + -N (0.066 mg ·L- 1), and moderate DO (8.47 mg ·L- 1). Species associated in the collections containing D. liuweii include: Achnanthidium minutissimum (Kützing) Czarnecki (1994: 157) (16.1%), Rossithidium petersenii (Hustedt) Aboal in Aboal et al. (2003: 178) (5.7%), Lemnicola exigua (Grunow) Kulikovskiy, Witkowski & Plinski in Plinski & Witkowski (2011: 112) (4.5%), Humidophila contenta (Grunow) Lowe, Kociolek, J.R.Johansen, Van de Vijver, Lange-Bertalot & Kopalová (2014: 357) (5.4%), Halamphora montana (Krasske) Z. Levkov (2009: 207) (6.5%), Cocconeis placentula Ehrenberg (1838:194) (2.1%), Encyonopsis leei Krammer (2003: 514) (2.7%), Luticola mutica (Kützing) Mann in Round et al. (1990: 670) (2.1%), Nitzschia palea (Kützing) Smith (1856: 89) (14.8%), Nitzschia valdecostata Lange-Bertalot & Simonsen (1978: 58) (2.4%), Gomphonella olivacea (Hornemann) Rabenhorst (1853: 61) (2.8%), Navicula trivialis Lange-Bertalot (1980: 31) (6.3%) and other unidentified species of Gomphonema Ehrenberg (1832: 87) and Cymbella (Agardh 1830: 1).
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- GXLJ
- Event date
- 2018-07-08
- Family
- Cymbellaceae
- Genus
- Delicatophycus
- Kingdom
- Chromista
- Material sample ID
- GXLJ01
- Order
- Cymbellales
- Phylum
- Bacillariophyta
- Scientific name authorship
- Liu & Li & Wu & Kociolek
- Species
- liuweii
- Taxon rank
- species
- Type status
- holotype
- Verbatim event date
- 2018-07-08
- Taxonomic concept label
- Delicatophycus liuweii Liu, 2021 sec. Liu, Li, Wu & Kociolek, 2021
References
- Czarnecki, D. B. (1994) The freshwater diatom culture collection at Loras College, Dubuque, Iowa. Memoirs of the California Academy of Sciences 17: 155 - 174.
- Aboal, M., Alvarez Cobelas, M., Cambra, J. & Ector, L. (2003) Floristic list of non-marine diatoms (Bacillariophyceae) of Iberian Peninsula, Balearic Islands and Canary Islands. Updated taxonomy and bibliography. Diatom Monographs 4: 1 - 639.
- Plinski, M. & Witkowski, A. (2011) Okrzemki - Bacillariophyta (Diatoms) (with the English key for the identification to the genus) Cz. 4 / 2: Okrzemki pierzaste (Fragilariophyceae, Eunotiophyceae, Achnanthales) Part two: Pennate diatoms - I). In: Flora Zatoki Gdanskiej i wod przyleglych (Baltyk poludniowy). pp. 1 - 167.
- Levkov, Z. (2009) Amphora sensu lato. In: Lange - Bertalot, H. (Ed.) Diatoms of Europe. Diatoms of the European inland waters and comparable habitats. Vol 5. A. R. G. Gantner Verlag, Ruggel, 918 pp.
- Ehrenberg, C. G. (1838) Die Infusionsthierchen als vollkommene Organismen. Ein Blick in das tiefere organische Leben de Natur. Verlag von Leopold Voss, Leipzig, pp. xvii, 548, pls. 64. https: // doi. org / 10.5962 / bhl. title. 97605
- Krammer, K. (2003) Cymbopleura, Delicata, Navicymbula, Gomphocymbellopsis, Afrocymbella. In: Lange-Bertalot, H. (Ed.) Diatoms of Europe. Vol. 4. A. R. G Gantner Verlag K. G., Ruggell, 530 pp.
- Round, F. E., Crawford, R. M. & Mann, D. G. (1990) The diatoms. Biology and morphology of the genera. Cambridge University Press, Cambridge, 747 pp.
- Lange-Bertalot, H. & Simonsen, R. (1978) A taxonomic revision of the Nitzschia lanceolatae Grunow. 2. European and related extra European fresh water and brackish water taxa. Bacillaria 1: 11 - 111.
- Lange-Bertalot, H. (1980) Zur systematischen Bewertung der bandformigen Kolonien bei Navicula und Fragilaria. Kriterien fur die Vereinigung von Synedra (subgen. Synedra) Ehrenberg mit Fragilaria Lyngbye. Nova Hedwigia 33: 723 - 787.
- Ehrenberg, C. G. (1832) Uber die Entwickelung und Lebensdauer der Infusionsthiere; nebst ferneren Beitragen zu einer Vergleichung ihrer organischen Systeme. Abhandlungen der Koniglichen Akademie der Wissenschaften zu Berlin, Physikalische Klasse 1831: 1 - 154, pls I - IV.
- Agardh, C. A. (1830) Conspectus criticus diatomacearum. Part 1. Litteris Berlingianis, Lund, 16 pp.